I just want a new empty one to start a new project.

Does anyone has a guess what it might be?
Thanks.
Using:
Mac OS X 10.7.3
MacBook Air Late 2011
Ableton 8.2.7
I can't locate the file preference.cfg it is not under Mac OS X: /Users/Library/Preferences/Ableton/doghouse wrote: Locate the preferences file, delete and set all your preferences over again.